Self-lubricating air-cock for rock-drills.



G. SENN. SELF LUBRIGATING AIR coc'K Fon ROOK DRILLS.

APPLICATION FILED AUG. 17, 1908.

-Paltented Sept. 7, 1909.

2 summa-SHEET 1.

Carl

G. SBNN. SELF LUBRIGATING A1B 000K Pon 1100K DBILLS.

APPLIOATION FILED AUG. 17, 1908.

Patll'd Spt. 7, 1909. a SHEETS-SHEET 2.

UNITED sTATEs PATENT oEEICE;

CARL SENN, OF STOCKTON,.CALIFORNIA, ASSIGNOR OF ONE-HALF T J. JEROME SMITH, OF STOCKTON, CALIFORNIA, AND ONE-FOURTH TO DAVID C. DEMAREST, OF SAN' FRANCISCO, CALIFORNIA.

' Specification of Letters Patent.

' Patented Sept. 7, 1909;-

Application med August i?, 190s. serial No. 443,891.

To all whom 'it may concern: L

Be it known that I, CARL SENN, a citlzen of the United States, residing at Stockton,

in the county of San Joaquin, State of California, have invented certain new and useful Improvements in Self- Lubricating. `Air- Cocks for Rock-Drills; and I do declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertain's to make and use the same, reference being had to the accom anying drawings, and to the characters o reference marked thereon, which form a part of this application.

This invention relates to improvements in mining machinery and particularly to air cocks used in connection with rock drills, the object of the invention being to produce an air cock adaptable forpipe lines leading to rock drills or similar machines whichemploy a fluid pressure such as compressed air or steam, which cock shall have in combination with its functions as a valve, a means or mechanism for oiling the valve and all parts of the machinery every time the valve is closed and opened again.

A further object is to produce such oilin means in a simple and effective manner` and one capable ofregulating the passage of the oil according as it is needed, as for instance when starting the machine very little oil or none at all would be needed.

These objects I accomplish by means of a valve comprising a valve casing having main outlet and inlet ports and an oil chamber, a freely turnable hollow plug in said casing having main orts to communicate with the main ports o said casing, ports adapted to communicate from the upper end of said oil chamber to the interior of said plug when the valve is open, ports adapted to communicate from the bottom of said oil chamber to the interior of said plug when the valve 45 is closed, and ports adapted to communicate from the interior of said plug to the atmosphere prior to the communication of said last named ports. Y

The principle employed in the device is to use the live pressure passing through the open valve to compress the oil in the oil chamber by deiiecting some of the air pressure through the lirst named ports, and when the valve is closed the pressure within 'the hollow plug is relieved to the atmosphere and the pressure in said oil chamber forces oil through said second named ports into said hollow plug until the'pressure in the oil chamber and plug is equalized. Then when the Valve is opened again, the air or steam passing through such hollow plug picks up the oi and carries to the machinery, the valve itself being also oiled thereby. Such other and further construction and relative arrangement of parts are employed as will appear by a perusal of the following specitcation and claims.

In the drawings similar characters of reference indicate corresponding parts in the several views.

Figure 1 is a vertical section of the improved valve showing the ports open. Fig. 2 is a cross section of the valve taken at right angles to the section shown in Fig. 1 showing the main ports closed. Figs. 3 and 4 are similar views showing a modified type of valve employing the -same principle. Fig. 5 is a sectional view taken relatively on a line :1c-w of Figxllooking upward. Fig. 6 is a sectional view taken relatively on a line y-g/ of Fig. 3 looking upward.

Referring now more particularly to the characters of reference on'the drawings 1 designates the casing of the valve having the usual main inlet and outlet ports 2 and 3. Formed on the lower end of said valve seat is an oil chamber 4 having a plugged inlet 5 and a removable bottom cap 6.

7 designates the valveplug which is hollow and inserted in the head 1 and having main ports 8 and 9 to aline with the main ports 2and 3 to open the valve. A spiral spring 10 bears between the bottom of the' plug 7 and the cap 6 to maintain the plug in position.

Portsl 11 lead from the chamber 4 and register with a port 12 in the plug 7 when the valve is open thus permitting the oil 13 in the chamber 4 to become under pressure from the air or steam passing through said valve. I have provided two of the ports 11 oppositely disposed so that either one will register with the port 12 no matter in which direction the valve is opened.

When the valve plug 7 is operated to just close the ports 9 and 3 and 8 and 2, a port 14 in the plug 7 registers with an atmospheric port l5 in the head thus releasing l, so

4 the pressure from within the plug to the atmosphere. Then when the port 12 is turned at substantially right angles to the ports 2 and 3 it registers with a port 16 leading from the bottom of the chamber 4 which permits the compressed air 'to blow a little oil into the hollow plug 7 until the pressures in said plug 7 and said oil chamber 4 are equalized, the. ports 14 being out of register with the ports v15 during this operation. Then when the valve is again opened the air or steam passing through the plug 7 picks up this oil and carries to the various parts of the machinery. I also provide two ports 16 as well as two ports 11 so that the oil will be admitted no matter in which way the valve is operated, If no oil is needed for the machinery then the plug 7 may be turned just to the lapped position described and then back again to open position without permitting any entrance of oil. I provide four ports 14 two on each side'of the plug 7 to insure the atmospheric escape no matter in what position the valve is turned.

Figs. 3, 4 and 6 are views showing a modiedform of the device from that shown in,

Figs. 1, 2 and 5. In these views there is an oil chamber 17 in the bottom of the casing 1a and another one 18 above the casing, the two communicating with each other by means of a port 19 in the side of the casing.

When the valve is open a port 20 communi-l cates from the interior of the plug 21 to the chamber 18 thus placing the oil therein under compression. Then when the valve is closed the port 20 in the plug 21 registers with one of four atmospheric bleed ports 22 in the side of the casing l*L to permit the escape of the air pressure therein, and then when the valve is further closed a port 23 in the plug 21 communicates with the port 19 and the pressure on the oil forces alittle into the interior of the plug 21.

From the foregoing description it will be readily seen that I have produced a device which substantially fulfils the object of the invention as set forth herein.

While this specification sets forth in detail the present `and preferred construction of the device still in practice such deviations from such detail maybe resorted to as do notform a departure from the spirit of the invention. i

\ Having thus described my invention what I claim as new and useful and desire to secure by Letters Patent is I 1. A valve casing having main ports and an oil chamber, a valve in said casing comprising a hollow plug freely turnable in said valve casing and having main ports to register with the main ports, of said valve casing, means for placing the oilk in said chamopened, and means for admitting said `oil into the plug when the valve is closed.

2. A valve casing having main ports and an oil chamber, a valve in said casing com- -prising'a freely turnable plug having main ports to register with the main ports in said casing, means admitting air under pressure to said oil chamber when the valve is opened, means relieving the pressure in said plug when'the valve is just closed, and means for admitting said' oil from said oil chamber into said plug after the relieving of the pressure therein.

3. A valve casing having main ports and an oil chamber, a. turnable' valve plug in said casing havmg a main port to register with said main ports in the valve casing, said plug having an oil pocket with an oil feed port .in the plug discharging into said pocket, and the casing having two ports entering the oil chamber and registrable with said oil feed port in the plug, said pocket in the plug opening into sald main ports in the valve casing when the valve is open.

4. The combination of a valve casing having main ports and an oil reservoir, a plug having a port communication with said pressure to the oil reservoir when the valve is turned in one direction, and for admit ting oil to the valve ports from the reservoir rection.

in presence of two witnesses. f

. CARL SENN. Witnesses:

PERGY S. WEBSTER, FRANK H. CARTER.

ber under air compression when the valve is main ports 1n the valve casing, s aid plug and casing having means for admitting air when the valve is turned in the opposite di-V l In testimony whereof I affix my signature y 

